Scale 3d view display if largest axis is more than 3 times the smallest

one

xsocs/gui/view/QspaceView.py

@@ -61,6 +61,17 @@ except ImportError:
     SFViewParamTree = None
 
 
+# Monkey patch ScalarFieldView
+from pkg_resources import parse_version
+import silx
+if parse_version(silx.version) < parse_version('0.10.0'):
+    from silx.gui.plot3d.scene import transform
+
+    class ScalarFieldView(ScalarFieldView):
+        def setOuterScale(self, sx=1., sy=1., sz=1.):
+            self._bbox.transforms = [transform.Scale(sx, sy, sz)]
+
+
 def _useOpenGL():
     """Returns True if OpenGL is available and enabled
 
@@ -508,7 +519,11 @@ class QSpaceView(Qt.QMainWindow):
                 widget.setText(label)
 
             if self.__view3d is not None:
-                # swap scale, transition, labels as it is follows x, y, z convention
+                extents = np.array(binSteps) * np.array(qspace.shape)[::-1]
+                if extents.max() / extents.min() > 3.:
+                    _logger.info("Rescale 3D View to display data as a cube")
+                    self.__view3d.setOuterScale(*(1. / extents))
+
                 self.__view3d.setScale(*binSteps)
                 self.__view3d.setTranslation(*minBinEdge)